SN54273, SN54LS273, SN74273, SN74LS273

OCTAL D-TYPE FLIP-FLOP WITH CLEAR

SDLS090 – OCTOBER 1976 – REVISED MARCH 1988

2

POST OFFICE BOX 655303

schematics of inputs and outputs

VCC

EQUIVALENT OF EACH INPUT

INPUT

Req

′273

Clear: Req = 3 kΩ NOM

Clock: Req = 6 kΩ NOM

All other inputs: Req = 8 kΩ NOM

VCC

TYPICAL OF ALL OUTPUTS

100

Ω

NOM

OUTPUT

VCC

EQUIVALENT OF EACH INPUT

INPUT

20 k

Ω

NOM

′LS273

VCC

TYPICAL OF ALL OUTPUTS

120

Ω NOM

OUTPUT

logic diagram (positive logic)

11

CLOCK

1

CLEAR

1D

1Q

R

C1

1D

1D

C1

R

2Q

2D

1D

C1

R

3Q

3D

1D

C1

R

4Q

4D

1D

C1

R

5Q

5D

1D

C1

R

6Q

6D

1D

C1

R

7Q

7D

1D

C1

R

8Q

8D

2

34

5

7

6

8

9

13

12

14

15

17

16

18

19

Pin numbers shown are for the DW, J, N, and W packages.